A thesis statement usually appears at the end of the introductory paragraph of a paper, and it offers a concise summary of the main point or claim of the essay, research paper, etc. A thesis statement is usually one sentence that appears at the end of the first paragraph, though it may occur as more than one. The thesis statement is developed, supported, and explained in the course of the paper by means of examples and evidence. Thesis statements help organize and develop arguments, and serve as a signal to readers about the topic of a paper. They are essential components of scholarly research papers.
Types of thesis statements
The thesis statement will reflect the kind of paper you are writing. There are three kinds of papers: analytical, expository, and argumentative. The thesis will take a different form for each of these kinds of papers. 
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